<template>
  <Dialog v-model="dialogVisible" title="本次还款金额" width="600">
    <el-form
      ref="formRef"
      v-loading="formLoading"
      :model="formData"
      :rules="formRules"
      label-width="130px"
    >
      <el-form-item label="剩余还款金额(元)" prop="balance">
        <el-input :model-value="formData.balance" class="!w-240px" disabled />
      </el-form-item>

      <el-form-item label="本次还款金额(元)" prop="changeBalance">
        <el-input-number
          v-model="formData.changeBalance"
          :min="0"
          :precision="2"
          :step="0.1"
          class="!w-240px"
        />
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button :disabled="formLoading" type="primary" @click="submitForm">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
<script lang="ts" setup>
import * as WalletApi from '@/api/pay/wallet/balance'
import { convertToInteger, formatToFraction } from '@/utils'

/** 修改用户余额表单 */
defineOptions({ name: 'UpdateBalanceForm' })

const { t } = useI18n() // 国际化
const message = useMessage() // 消息弹窗

const dialogVisible = ref(false) // 弹窗的是否展示
const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
const formData = ref({
  balance: '0',
  changeBalance: 0
})
const formRules = reactive({
  changeBalance: [{ required: true, message: '本次还款金额不能为空', trigger: 'blur' }]
})
const formRef = ref() // 表单 Ref

/** 打开弹窗 */
const open = async (price) => {
  dialogVisible.value = true
  resetForm()
  // 修改时，设置数据
  if (price) {
    formLoading.value = true
    try {
      formData.value.balance = formatToFraction(price.totalPrice)
      formData.value.changeBalance = 0 // 变动余额默认0
    } finally {
      formLoading.value = false
    }
  }
}
defineExpose({ open }) // 提供 open 方法，用于打开弹窗

/** 提交表单 */
const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
const submitForm = async () => {
  // 校验表单
  if (!formRef) return
  const valid = await formRef.value.validate()
  if (!valid) return

  if (formData.value.changeBalance <= 0) {
    message.error('本次还款金额不能为零')
    return
  }

  // 提交请求
  formLoading.value = true
  try {
    let params = {
      balance: convertToInteger(formData.value.changeBalance)
    }
    message.success(t('common.updateSuccess'))
    dialogVisible.value = false
    // 发送操作成功的事件
    emit('success', params)
  } finally {
    formLoading.value = false
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    balance: '0',
    changeBalance: 0
  }
  formRef.value?.resetFields()
}
</script>
